I need “/var/www” but Apache2 try to use an empty “/var/www/html”

Question

This days I sleep with my http://localhost working, and reading pages from /var/www...

I woke up with an "AH00094" error at Apache2

Answer 1

See here:

Why has the apache2 www dir been moved to /var/www/html?

The default directory apparently (we were also surprised) moved from /var/www to /var/www/html for htdocs in Debian, and Ubuntu copied this change. The reasons given are somewhat sound, but the upgrade path is probably “interesting” (as in the Chinese proverb)… as you have encountered.